you found nothing on “live sand” because that is essentially irrelevant to your goal. look at ANY “how do I get BHO into a cart”.
if you want something that works in a cart, you need to get the viscosity right. the simple way to do that with any THCA rich extract is to decarb.
the problem with decarbing your live resin, is that you’ll darken it and wreck the terpene profile (which you paid extra for).
you could add diluents (terps maybe), but again, that is likely to wreck your concentrate (there IS such a thing as too many “terps”).
you certainly don’t want crystaline THCA in a cart. again, best way to make sure that doesn’t happen is to turn (most of) it into THC (decarb).
you might consider Decarb under pressure to retain terps?
or get yourself an actual dab rig…